English verb conjugation
MUST SNUFFLE

Regular verb: snuffle - snuffled - snuffled

Affirmation

Simple form	V-ing form
I must snuffle you must snuffle he must snuffle we must snuffle you must snuffle they must snuffle	I must be snuffling you must be snuffling he must be snuffling we must be snuffling you must be snuffling they must be snuffling
Perfect	V-ing perfect
I must have snuffled you must have snuffled he must have snuffled we must have snuffled you must have snuffled they must have snuffled	I must have been snuffling you must have been snuffling he must have been snuffling we must have been snuffling you must have been snuffling they must have been snuffling

Negation

Simple form	V-ing form
I must not snuffle you must not snuffle he must not snuffle we must not snuffle you must not snuffle they must not snuffle	I must not be snuffling you must not be snuffling he must not be snuffling we must not be snuffling you must not be snuffling they must not be snuffling
Perfect	V-ing perfect
I must not have snuffled you must not have snuffled he must not have snuffled we must not have snuffled you must not have snuffled they must not have snuffled	I must not have been snuffling you must not have been snuffling he must not have been snuffling we must not have been snuffling you must not have been snuffling they must not have been snuffling

Interrogative form

Simple form	V-ing form
must I snuffle? must you snuffle? must he snuffle? must we snuffle? must you snuffle? must they snuffle?	must I be snuffling? must you be snuffling? must he be snuffling? must we be snuffling? must you be snuffling? must they be snuffling?
Perfect	V-ing perfect
must I have snuffled? must you have snuffled? must he have snuffled? must we have snuffled? must you have snuffled? must they have snuffled?	must I have been snuffling? must you have been snuffling? must he have been snuffling? must we have been snuffling? must you have been snuffling? must they have been snuffling?

Interro-negative form

Simple form	V-ing form
must I not snuffle? must you not snuffle? must he not snuffle? must we not snuffle? must you not snuffle? must they not snuffle?	must I not be snuffling? must you not be snuffling? must he not be snuffling? must we not be snuffling? must you not be snuffling? must they not be snuffling?
Perfect	V-ing perfect
must I not have snuffled? must you not have snuffled? must he not have snuffled? must we not have snuffled? must you not have snuffled? must they not have snuffled?	must I not have been snuffling? must you not have been snuffling? must he not have been snuffling? must we not have been snuffling? must you not have been snuffling? must they not have been snuffling?